GHSA-PF4J-PF3W-95F9 nimiq-transaction: UpdateValidator transactions allows voting key change without proof-of-knowledge

Impact The staking contract accepts UpdateValidator transactions that set newvotingkey=Some... while omitting newproofofknowledge. this skips the proof-of-knowledge requirement that is needed to prevent BLS rogue-key attacks when public keys are aggregated. Because tendermint macro block...